Today, we have many hybrids between different species of dogs, cattles, wheat, and such. Those are hybrids in the same gender, which is a believable evidence that organisms evolved into other species inside the same gender. But do we have any hybrids between organisms not in the same gender, but in the same class? In other words, between different gender? Such as a cat to a tiger. That kind of hybrid would not be able to survive.

Then from whom did the first species in the gender evolve from, and how? We need the first species in the same gender to have evolved from another gender, right? So that say the first species of dog evolved into different breeds of dogs, but where did the first dog come from? he could not have evolved directly from a unicellular could he? And a hybrid from another gender (in other words, half-way evolved species) would not survive.

I dont really know if I worded it right, so I might not make sense, but oh well, you guys comment and if I see some people misunderstand me, I'll do the best I can to try to reword it.